Ongoing Russian drone incursions into NATO airspace, including strikes injuring civilians in Romania in May 2026 and earlier incidents in Poland and Estonia, have prompted Article 4 consultations and enhanced eastern flank defenses such as Operation Eastern Sentry, but have not crossed the threshold for unanimous Article 5 invocation. The Russia-Ukraine conflict continues with hybrid and gray-zone tactics that test alliance resolve without triggering collective defense obligations. U.S. policy under the second Trump administration has emphasized burden-sharing and conditional commitments tied to defense spending targets, yet NATO maintains coordinated support for Ukraine and conducts large-scale exercises simulating responses to potential aggression. These patterns of calibrated escalation, diplomatic consultations, and institutional restraint sustain trader consensus that an armed attack sufficient to activate Article 5 remains unlikely before 2027.